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# Copyright 1999-2005 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Id: mysql.eselect,v 1.3 2006/01/07 22:40:38 vivo Exp $
DESCRIPTION="Manage the /usr/lib/*mysql* links"
MAINTAINER="vivo@gentoo.org"
SVN_DATE='$Date: 2006/01/07 22:40:38 $'
VERSION=$(svn_date_to_version "${SVN_DATE}" )
MYSQL_SYMLINK_CHECKDIR="${ROOT}/usr/sbin"
ERR_NOT_FOUND="(not-found)"
ERR_UNSET="(unset)"
# return a human oriented version
#
# $1 - version to transform
function version4human() {
local major=${1:0:1}
local minor=${1:1:2}
[[ ${minor:0:1} == "0" ]] && minor=${minor:1:1}
echo "${major}.${minor}.x"
}
# return a integer version
#
# $1 - version to transform
function version4bash() {
local minor=${1#*.}
minor=${minor%%.x*}
[[ ${#minor} -eq 1 ]] && minor="0${minor}"
echo "${1%%.*}${minor}"
}
# Return the versions currently installed
find_versions() {
local versions lis
# "eselect mysql set 1" will always set the best version
list=${MYSQL_SYMLINK_CHECKDIR}/mysqld-*
[[ ${list##/} == mysqld-* ]] && return
for x in ${MYSQL_SYMLINK_CHECKDIR}/mysqld-* ; do
versions=( $(version4human ${x##*-}) ${versions[@]} )
done
echo ${versions[@]}
}
# Check if a symlink could be created for a specific file
#
# $1 - original file name
# $2 - MySQL version
check_symlink() {
local filename=${1}
local version=${2}
local linkname=${filename/"-${version}"/}
local ret=0
[[ -z ${filename} ]] || [[ -z ${version} ]] && return 1
# check link source
[[ -f ${filename} ]] || [[ -f "${filename}.gz" ]] \
|| [[ -d ${filename} ]] || ret=$(( ${ret} + 1 ))
# check link targe
# not checking for directory (want to keep "/etc/mysql")
[[ -a ${linkname} ]] && [[ ! -L ${linkname} ]] && [[ ! -d ${linkname} ]] \
&& ret=$(( ${ret} +2 ))
return ${ret}
}
# work out which MYSQL version the user has chosen from the list
#
# $1: the list id that the user has chosen
get_version_fromlist() {
local version=${1}
local -a versions=( $(find_versions) )
if is_number ${version} ; then
if [[ ${version} -gt 0 ]] && [[ ${version} -le ${#versions[@]} ]] ; then
version=${versions[(( ${version} - 1 ))]}
echo "${version}"
return
fi
fi
for (( i = 0 ; i < ${#versions[@]} ; i = i + 1 )) ; do
[[ ${versions[$i]} == ${version} ]] || continue
echo ${version}
return
done
echo "${ERR_NOT_FOUND}"
}
get_current_version() {
link=$(readlink ${MYSQL_SYMLINK_CHECKDIR}/mysqld)
version=${link##*-}
if ! is_number "${version}" || [[ "${version}" == "" ]] ; then
version="${ERR_UNSET}"
echo "${version}"
else
echo $(version4human "${version}")
fi
}
set_current_version() {
local version=${1}
is_number "${version}" || die -q "No usable version: ${version}"
local CWD=$(pwd)
local lastdir dir linkname linkname2
local list=$(< $ROOT/var/lib/eselect/mysql/mysql-${version}.filelist )
# perform a check on the entire file lis
for filename in $list ; do
dir="${ROOT}/$(dirname "${filename}")"
if [[ "${dir}" != "${lastdir}" ]] ; then
cd "${dir}"
lastdir="${dir}"
fi
check_symlink "$(basename "${filename}")" "${version}"
ret=$?
if [[ $ret -ne 0 ]] ; then
cd "${CWD}"
die -q \
"File \"${ROOT}/${filename}\" is not suitable for symlink (${ret})"
fi
done
# it's ok to do the effective work now
for filename in $list ; do
dir="${ROOT}/$(dirname "${filename}")"
if [[ "${dir}" != "${lastdir}" ]] ; then
cd "${dir}"
lastdir="${dir}"
fi
linkname="$(basename "${filename}")"
for linkname2 in "${linkname}" "${linkname}.gz" ; do
if [[ -a "${linkname2}" ]] ; then
# rm needed for directory
rm -f "${linkname/"-${version}"/}" &> /dev/null
ln -sf "${linkname2}" "${linkname2/"-${version}"/}"
[[ ! -L "${linkname2/"-${version}"/}" ]] \
&& write_warning_msg "FAILED: cd \"${dir}\" && ln -sf \"${linkname2}\" \"${linkname2/"-${version}"/}\""
fi
done
done
cd "${CWD}"
}
### show action ###
describe_show() {
echo "Show the current default version for MySQL"
}
do_show() {
write_list_start "Current default MySQL version:"
version=$(get_current_version)
write_kv_list_entry "$version" ""
}
### list action ###
describe_list() {
echo "List available MySQL versions to link to"
}
do_list() {
versions=( $(find_versions) )
current=$(get_current_version)
write_list_start "Available MySQL versions:"
if [[ -n "${versions[@]}" ]] ; then
local i
for (( i = 0 ; i < ${#versions[@]} ; i = i + 1 )) ; do
[[ ${versions[${i}]} == ${current} ]] && \
versions[${i}]="${versions[${i}]} $(highlight '*' )"
done
write_numbered_list "${versions[@]}"
else
write_kv_list_entry "(none found)" ""
fi
}
### set action ###
describe_set() {
echo "Set MYSQL version used"
}
do_set() {
[[ ${#@} -lt 1 ]] &&
die -q "Wrong count of paramters."
local version
version=$(get_version_fromlist ${1})
if [[ ${version} == "${ERR_NOT_FOUND}" ]] ; then
die -q "I don't recognise that version of MYSQL"
fi
set_current_version "$(version4bash "${version}")"
}
# vim: set ft=eselect :
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